Building Diana: A Voice Assistant in Python
2024-09-209 min read
PythonAIVoice Assistant
## Why Build a Voice Assistant
I wanted to understand how Siri and Alexa worked under the hood. So I built my own — Diana.
## The Tech Stack
- **Python**: Core language
- **SpeechRecognition**: For voice input
- **gTTS**: For text-to-speech output
- **Telegram API**: For remote control and notifications
### Key Features
1. **Voice commands**: Play music, set timers, search the web
2. **Telegram integration**: Send commands via chat, get notifications
3. **Custom wake word**: "Hey Diana" to activate
4. **Memory**: Remembers user preferences
## Challenges
The hardest part was making it reliable. Speech recognition is noisy, and natural language processing is hard. I ended up using a simple intent-matching system instead of full NLP.
## What I Learned
- **AI is hard**: Building something that "just works" takes way more effort than you think
- **Edge cases are everywhere**: What if there's background noise? What if the user mumbles?
- **Start simple**: My first version was a glorified if/else chain, and it worked fine